Oz Fin Chasers

Bite indicators/Swingers primary function is to keep tension on the line (secondarily, they provide a visual indication of a bite). If the hooked fish always swam away from shore, swingers would not be so important. Swimming away pulls line through the buzzer, spins the little wheel inside and sets off the alarm. If the fish swims toward you, the line just goes slack and the buzzer would not buzz. The weight of the swinger (or hanger) pulls the slackening line down and through the buzzer causing it to buzz.